Can the UCC38051,be used with UVLO=11.5v?
One of our customers using TDA4862,as he has Voltage supply of 12V+-0.5V
b.regards
Eli
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The UVLO turn on and turnoff thresholds are specified in the data sheet. I looked up the specification for ULVO turn on and it is 12.0 to 13.0V for the UCC28051. For the UCC28050 it is 15.4V to 16.4V for UVLO turn on. That being said if the device is only to be powered by 11.5V bias supply neither device would startup. I checked the TDA4862 data sheet and it looks like the UVLO is 11V turnon and 8.5V turnoff.
Out UCC28050/1 are our low cost transition mode PFC controllers. If your customer wants to use it they will have to use a higher bias voltage than 11.5V that they use for the TDA4862. This would require they adjust their bias supply.